The water temperature (16 °C) at Onrus is quite cool. If the sun shines as we have forecast, it should feel warm enough to surf in a good spring wetsuit. Effective windchill factor of (19 °C) will make the air and water feel about the same temperature.

Onrus water temperatures peak in the range 19 to 22°C (66 to 72°F) on around the 28th of January and are at their minimum on about the 16th of July, in the range 14 to 16°C (57 to 61°F). Onrus water temperatures are highest in the fourth week of January. Surfers should use a 2mm long sleeve shorty or a 3/2mm spring wetsuit if the wind is up. The minimum seasonal water temperatures at Onrus in the middle of July lend themselves to a 4/3mm wetsuit or a 3/2mm suit and 3mm neoprene boots.